CN214247996U

CN214247996U - Waterproof ball bearing

Info

Publication number: CN214247996U
Application number: CN202023304747.6U
Authority: CN
Inventors: 曹永辉; 平静艳; 洪六辉; 戴学利; 唐大超; 戴之钧
Original assignee: Bahuan Bearing Changxing Co ltd
Current assignee: Bahuan Bearing Changxing Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-21
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a bearing field specifically discloses a waterproof ball bearing. The waterproof ball bearing comprises an inner ring, an outer ring, a rolling body and a waterproof assembly, wherein the waterproof assembly comprises two waterproof units which are symmetrically arranged, and the rolling body is arranged between the two waterproof units; the waterproof unit comprises a sealing ring and a waterproof sheet, the sealing ring is positioned on the inner side of the waterproof sheet, and the sealing ring and the waterproof sheet are independently arranged; the outer edge of the sealing ring is connected with the outer ring, and the inner edge of the sealing ring corresponds to the inner ring; the inner edge of the waterproof sheet is connected with the inner ring, and a water outlet channel is formed between the outer edge and the outer ring. Above waterproof ball bearing can be fine realize waterproof, guarantee the normal operating of equipment.

Description

Waterproof ball bearing

Technical Field

The utility model relates to a bearing field especially relates to a waterproof ball bearing.

Background

The bearing is an important part used in mechanical equipment, and has the main functions of supporting the rotating body, reducing the friction coefficient of the rotating body in the motion process and ensuring the rotation precision. In order to adapt to different working conditions, the types of bearings are also various, for example: the bearing is mainly used for bearing a radial load, is mainly used for bearing an axial load, and is used for a linear bearing of linear transmission and the like.

In some heavy machinery, the working environment is generally poor, the heavy machinery is exposed in various impurities such as dust, water, mud and the like for a long time, and the working stability of the conventional bearing is difficult to guarantee.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a waterproof ball bearing, fine realization is waterproof, guarantees the normal operating of equipment.

In order to solve the technical problem, the utility model provides a technical scheme as follows: a waterproof ball bearing comprises an inner ring, an outer ring, a rolling body and a waterproof assembly, wherein the waterproof assembly comprises two waterproof units which are symmetrically arranged, and the rolling body is arranged between the two waterproof units; the waterproof unit comprises a sealing ring and a waterproof sheet, the sealing ring is positioned on the inner side of the waterproof sheet, and the sealing ring and the waterproof sheet are independently arranged; the outer edge of the sealing ring is connected with the outer ring, and the inner edge of the sealing ring corresponds to the inner ring; the inner edge of the waterproof sheet is connected with the inner ring, and a water outlet channel is formed between the outer edge and the outer ring.

When the waterproof sheet works, the sealing ring and the outer ring rotate synchronously, the waterproof sheet and the inner ring rotate synchronously, and the sealing ring and the waterproof sheet have higher relative rotation speed. However, when part of water enters between the waterproof sheet and the sealing ring from the water outlet channel, the water can be immediately thrown out from the water outlet channel under the high-speed installation and rotation of the waterproof sheet relative to the sealing ring, and cannot enter a motion area of the rolling body through the sealing ring, so that the waterproof effect is achieved.

Preferably, the inner edge of the sealing ring is provided with a first sealing lip made of an elastic material, the sealing ring is in sliding contact with the inner ring through the first sealing lip, a certain sealing and waterproof effect can be achieved, and even if part of water enters the space between the waterproof sheet and the sealing ring and is not thrown out, the part of water cannot further enter the motion area of the rolling body.

Preferably, the inner side of the outer ring is provided with an inner insertion groove, and the outer edge of the sealing ring is inserted into the inner insertion groove and clamped with the outer ring.

Preferably, the edge of the inner side of the outer ring is provided with a chamfer, and the outer edge of the waterproof sheet is provided with an outward inclined guide inclined plane; the guide inclined plane corresponds to the chamfer and jointly encloses a water outlet channel, plays a role in guiding the discharge of water and can also prevent external water from directly entering.

Preferably, the outer side of the inner ring is provided with an outer clamping groove, and the inner edge of the waterproof sheet is inserted into the outer clamping groove and clamped with the inner ring. The outer clamping groove is arranged on the outer side of the inner ring, the waterproof sheet is installed in a clamping mode, the waterproof sheet can be integrally limited in the range of the inner ring and the outer ring in the axial direction, interference to operation due to the fact that the waterproof sheet is protruded is avoided, and the integral structure is compact.

Preferably, the waterproof sheet comprises a main body and a clamping part corresponding to the outer insertion groove, and the main body is not contacted with the sealing ring; the clamping part is folded outwards to form a U shape.

Preferably, the inner side of the waterproof sheet is provided with a transition inclined plane positioned between the main body and the clamping part, and the transition inclined plane inclines outwards; and a second sealing lip in sliding contact with the transition inclined plane is further arranged on the sealing ring. The second sealing lip is in sliding contact with the outer waterproof sheet, plays a role in sealing and waterproofing, and strengthens the overall sealing effect together with the first sealing lip in a labyrinth sealing mode. The arrangement of the transition inclined surface can improve the contact reliability between the transition inclined surface and the second sealing lip.

Drawings

Fig. 1 is a schematic structural view of a waterproof ball bearing according to the embodiment;

FIG. 2 is a diagram illustrating a state of use of the waterproof ball bearing according to the present embodiment;

FIG. 3 is a partial enlarged view of the waterproof ball bearing of the present embodiment at A in FIG. 1;

fig. 4 is a force analysis diagram of the rolling element in the waterproof ball bearing of the embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

As shown in fig. 1, the waterproof ball bearing comprises an inner ring 3, an outer ring 1 and a rolling body 2, wherein the rolling body 2, the inner ring 3 and the outer ring 1 are in a four-point contact mode, and an outer contact angle between the rolling body 2 and the outer ring 1 is smaller than an inner contact angle between the rolling body 2 and the inner ring 3. Specifically, the inner contact angle is 35-40 degrees, and the outer contact angle is 25-30 degrees.

When subjected to an axial load, the rolling elements 2 contact and roll through two contact points diagonally distributed therein, thereby receiving the axial load. And (3) carrying out stress analysis on the rolling body under the working condition of axial load, wherein as shown in fig. 2 and 4, the load pole borne by the rolling body 2 is FN (positive) action point at a contact point, and the direction is axial. The load is divided along the tangential direction and the direction pointing to the circle center, wherein the component force pointing to the circle center is F1, and the tangential component force is marked as F2. According to the parallelogram rule, F1, F2 are both smaller than FN, and FN = F2/cos α, where α is the contact angle. Thus, it can be seen that: when the bearing capacities of the rolling elements 2, the inner race 3, and the outer race 1 are constant, that is, F2 is constant, FN is larger as the contact angle is larger.

However, in the case of the ball bearing, since the contact angle cannot be infinitely enlarged in consideration of the installation space of the rolling elements 2, the inner contact angle is set to be larger than the outer contact angle in consideration of the bearing capacities of the inner ring 3 and the outer ring 1, thereby maximally improving the axial bearing capacity.

As shown in fig. 1 and 3, the rolling bearing device further comprises a waterproof assembly 4, wherein the waterproof assembly 4 comprises two waterproof units which are symmetrically arranged, and the rolling body 2 is arranged between the two waterproof units. The waterproof unit comprises a sealing ring 41 and a waterproof sheet 42, wherein the sealing ring 41 is positioned on the inner side of the waterproof sheet 42, and the sealing ring 41 and the waterproof sheet 42 are independently arranged.

As shown in fig. 1 and 3, an inner insertion groove 11 is formed in the inner side of the outer ring 1, and an outer edge of the seal ring 41 is inserted into the inner insertion groove 11 and is engaged with the outer ring 1. The inner edge of the sealing ring 41 is provided with a first sealing lip 411, and the first sealing lip 411 is in sliding contact with the inner ring 3. The sealing and waterproof function can be achieved to a certain extent, and even if part of water enters between the waterproof sheet 42 and the sealing ring 41 and is not thrown out, the part of water cannot further enter the motion area of the rolling body 2.

As shown in fig. 1 and 3, an outer clamping groove is formed in the outer side of the inner ring 3, and an inner edge of the waterproof sheet 42 is inserted into the outer clamping groove and clamped with the inner ring 3. The outer clamping groove is formed in the outer side of the inner ring 3, the waterproof sheet 42 is installed in a clamping mode, the waterproof sheet 42 can be integrally limited in the range of the inner ring 3 and the outer ring 1 in the axial direction, interference to operation due to the fact that the waterproof sheet 42 protrudes is avoided, and the overall structure is more compact. The waterproof sheet 42 includes a main body and a clamping portion 421 corresponding to the outer insertion groove 31, the main body does not contact the sealing ring 41, and the clamping portion 421 is turned outward to form a U shape.

As shown in fig. 1 and 3, the edge of the inner side of the outer ring 1 is provided with a chamfer, and the outer edge of the waterproof sheet 42 is provided with an outward inclined guiding slope; the guide slopes correspond to the chamfers and jointly enclose a water outlet channel 43, which plays a role in guiding the water discharge and can prevent external water from directly entering.

As shown in fig. 1 and 3, a transition inclined plane 422 located at the main body and the clamping portion 421 is disposed on the inner side of the waterproof sheet 42, and the transition inclined plane 422 inclines outward. The sealing ring 41 is further provided with a second sealing lip 412 in sliding contact with the transition inclined surface 422. The second seal lip 412 is in sliding contact with the outer waterproof sheet 42, and plays a role of sealing and waterproofing, and enhances the overall sealing effect in a labyrinth seal form together with the first seal lip 411. The provision of the transition slope 422 can improve the contact reliability with the second seal lip 412.

During operation, the sealing ring 41 and the outer ring 1 rotate synchronously, the waterproof sheet 42 and the inner ring 3 rotate synchronously, and the sealing ring 41 and the waterproof sheet 42 have a large relative rotation speed. However, when some water enters between the waterproof sheet 42 and the sealing ring 41 from the water outlet channel 43, the water is immediately thrown out from the water outlet channel 43 under the high-speed rotation of the waterproof sheet 42 relative to the sealing ring 41, and cannot enter the motion area of the rolling element 2 through the sealing ring 41, so that the waterproof effect is achieved. The waterproof ball bearing can meet two technical requirements of heavy load and water resistance.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. The utility model provides a waterproof ball bearing, includes inner circle, outer lane and rolling element, its characterized in that: the rolling body is arranged between the two waterproof units; the waterproof unit comprises a sealing ring and a waterproof sheet, the sealing ring is positioned on the inner side of the waterproof sheet, and the sealing ring and the waterproof sheet are independently arranged;

the outer edge of the sealing ring is connected with the outer ring, and the inner edge of the sealing ring corresponds to the inner ring; the inner edge of the waterproof sheet is connected with the inner ring, and a water outlet channel is formed between the outer edge and the outer ring.

2. The waterproof ball bearing according to claim 1, characterized in that: the inner edge of the sealing ring is provided with a first sealing lip made of elastic materials, and the sealing ring is in sliding contact with the inner ring through the first sealing lip.

3. The waterproof ball bearing according to claim 1, characterized in that: the inboard of outer lane is equipped with the interpolation and connects the groove, the outer fringe of sealing washer inserts the interpolation and connects the groove and with the outer lane joint.

4. The waterproof ball bearing according to claim 1, characterized in that: the edge of the inner side of the outer ring is provided with a chamfer, and the outer edge of the waterproof sheet is provided with an outward inclined guide inclined plane; the guide inclined plane corresponds to the chamfer and jointly encloses a water outlet channel.

5. The waterproof ball bearing according to any one of claims 1 to 4, characterized in that: the outer side of the inner ring is provided with an outer clamping groove, and the inner edge of the waterproof sheet is inserted into the outer clamping groove and clamped with the inner ring.

6. The waterproof ball bearing according to claim 5, wherein: the waterproof sheet comprises a main body and a clamping part corresponding to the outer insertion groove, and the main body is not contacted with the sealing ring; the clamping part is folded outwards to form a U shape.

7. The waterproof ball bearing according to claim 6, wherein: the inner side of the waterproof sheet is provided with a transition inclined plane positioned between the main body and the clamping part, and the transition inclined plane inclines outwards; and a second sealing lip in sliding contact with the transition inclined plane is further arranged on the sealing ring.